99966719 has 2 divisors, whose sum is σ = 99966720. Its totient is φ = 99966718.

The previous prime is 99966703. The next prime is 99966721. The reversal of 99966719 is 91766999.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (91766999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99966719 - 2⁴ = 99966703 is a prime.

It is a super-2 number, since 2×99966719² = 19986689815249922, which contains 22 as substring.

Together with 99966721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99960719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49983359 + 49983360.

It is an arithmetic number, because the mean of its divisors is an integer number (49983360).

Almost surely, 2^99966719 is an apocalyptic number.

99966719 is a deficient number, since it is larger than the sum of its proper divisors (1).

99966719 is an equidigital number, since it uses as much as digits as its factorization.

99966719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 56.

The square root of 99966719 is about 9998.3358115238. The cubic root of 99966719 is about 464.1073854085.

The spelling of 99966719 in words is "ninety-nine million, nine hundred sixty-six thousand, seven hundred nineteen".